Sensor manufacturer / supplier in China, offering Soil Sensor RS485 High Performance with Ec Range and IP68 Protection, 3 in 1 Hand Held Grape Alcohol Refractometer for Winemakers Has Three Scales (0-25%Vol, 0-40%Brix, 0-22Baume), 8 in 1 RS485 Soil Testing Kit pH Ec TDS Soil Sensor Moisture Temperature Monitoring and so on.